Frost resistance and frost damage inpinus sylvestrisseedlings during shoot elongation
作者:
Risto Rikala,
Tapani Repo,
期刊:
Scandinavian Journal of Forest Research
(Taylor Available online 1987)
卷期:
Volume 2,
issue 1-4
页码: 433-440
ISSN:0282-7581
年代: 1987
DOI:10.1080/02827588709382480
出版商: Taylor & Francis Group
关键词: Pinus sylvestris;growth disturbance;frost resistance;seedlings;germlings;shoot elongation
数据来源: Taylor
摘要:
No differences were found in the frost resistance of the different‐aged (2–7 weeks) germlings of Scots pine. The critical temperature was ‐6°C to —3°C. A temperature of ‐4°C killed half of the germlings and produced damage in one fifth of the surviving seedlings; the needles turned brown and growth ceased. The frost resistance of the previous year's shoots of two‐year‐old seedlings, measured by the impedance method, decreased during the shoot elongation period from — 10°C to — 4°C. Damage to the current shoots during shoot elongation appeared as deformation and discolouration of the needles and abnormal development or death of the apical bud. The results indicate that frost is not the cause of growth disturbances observed in Finnish nurseries.
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